CrushFTP is a powerful file server well ahead of its time. Not only does it handle serving FTP, but it also does SFTP (SSH FTP), FTPS (FTP over SSL), HTTP, HTTPS, WebDAV, and WebDAV SSL. From that list you can see it is serious about security and encryption.
CrushFTP Small Business a allows 50 concurrent connections.
Updated on Nov 27 2019